<script language=”javascript” type=”text/javascript”>function doSpellCheck() {SpellCheckEntirePage(‘/_vti_bin/SpellCheck.asmx’, ‘/_layouts/SpellChecker.aspx’);}</script>
NOTE: Take care of single quotes after pasting
4. Now all you need to do is create a link or a button which starts the spell checker. to this you just need to add the onclick javascript method ‘doSpellCheck()’

<a href=”javascript:doSpellCheck()”>Spelling…</a>

NOTE: if you want to exclude spell checker of any control use excludeFromSpellCheck”true”eg: